Particle Precession Resonance Patents (Class 324/300)
  • Patent number: 11439361
    Abstract: Various methods and systems are provided for reducing vibration in a rotating body of a medical imaging system. In an example, a dynamic vibration absorber (DVA) for a medical imaging system includes a mount portion including one or more apertures and adapted to fixedly couple to a mount surface within the imaging system; a sprung portion; and a vibrational tuner, where when the mount portion is mounted to the mount surface and during operation of the imaging system, the sprung portion moves relative to the mount surface, an amount of movement of the sprung portion based at least in part on the vibrational tuner.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: September 13, 2022
    Assignee: GE Precision Healthcare LLC
    Inventors: Mark Reznicek, Chad Allan Smith, Charles Smith, James Kluth
  • Patent number: 11442119
    Abstract: An optical pumping magnetometer made with linearly polarised light. The magnetometer comprises a cell filled with an atomic gas and a detector configured to output a signal carrying information about an alignment state of atoms of the atomic gas in the cell. The magnetometer also comprises a collimator arranged to collimate a light beam before it illuminates the cell and a mirror arranged to reflect the collimated light beam after it has passed through the cell such that the collimated light beam makes a multipass through the cell and illuminates the same region of the cell several times.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: September 13, 2022
    Inventors: Agustin Palacios Laloy, William Fourcault
  • Patent number: 11442125
    Abstract: Various embodiments of the present disclosure are directed towards a magnetic resonance imaging (MRI) radio frequency (RF) coil configured to operate in at least one of a transmit mode or a receive mode. A first birdcage coil includes a pair of first-birdcage end rings and at least four first-birdcage rungs circumferentially arranged along the first-birdcage end rings. A second birdcage coil including a pair of second-birdcage end rings and at least four second-birdcage rungs circumferentially arranged along the second-birdcage end rings. The first and second birdcage coils neighbor and are spaced by a first non-zero distance along an axis. The axis is surrounded by the first-birdcage end rings and the second-birdcage end rings, and the first non-zero distance is greater than individual lengths of the first and second birdcage coils along the axis.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: September 13, 2022
    Assignee: Quality Electrodynamics, LLC
    Inventors: Xiaoyu Yang, Thomas Eastlake, Tsinghua Zheng
  • Patent number: 11419513
    Abstract: Wireless, variable inductance and resonant circuit-based vascular monitoring devices, systems, methodologies, and techniques, including specifically configured anchoring structures for same, are disclosed that can be used to assist healthcare professionals in predicting, preventing, and diagnosing various heart-related and other health conditions.
    Type: Grant
    Filed: September 8, 2021
    Date of Patent: August 23, 2022
    Assignee: Foundry Innovation & Research 1, Ltd.
    Inventors: Fiachra M. Sweeney, Hanson S. Gifford, III, Jessi Johnson, Pablo Martin, Stephen Sheridan, Douglas S. Sutton, Friedrich Wetterling, Conor M. Hanley
  • Patent number: 11360135
    Abstract: Methods and apparatus for sensing or measuring an electromagnetic field. The method entails excitation into a distribution of Rydberg states of atoms of a gas occupying a test volume coextensive with the electromagnetic field. Transmission along a path traversing the test volume of at least one probe beam of electromagnetic radiation is measured at one or more frequencies overlapping a spectral feature, and a physical characteristic of the electromagnetic field is derived on the basis of variation of the spectral feature. In various embodiments, the electromagnetic field may be place in interferometric relation with another electromagnetic field. Time-varying electric field amplitude, frequency, phase and noise spectral distribution may be measured, and thus AM and FM modulated fields, as well as magnetic fields of about 1 Tesla. The apparatus for measuring the electromagnetic field may be unilaterally coupled to a probe field and detector or array of detectors.
    Type: Grant
    Filed: November 2, 2020
    Date of Patent: June 14, 2022
    Assignee: Rydberg Technologies Inc.
    Inventors: David A. Anderson, Georg A. Raithel, Eric G. Paradis, Rachel E. Sapiro
  • Patent number: 11340281
    Abstract: An electronic device and method related to measurement of an electromagnetic (EM) signal emitted from an external electronic device. The electronic device including a processor, a memory, and an EM sensor. The memory stores instructions, which, when executed, enable the processor to: obtain an input signal including an electromagnetic signal of an external electronic device and a self-noise using the EM sensor; identify an ambient condition of the electronic device; identify a compensation self-noise corresponding to the ambient condition; generate a signal pattern, based on the input signal and the compensation self-noise; and identify the external electronic device, based on at least a part of the signal pattern.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: May 24, 2022
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Youngbae Lee, Yongseob Yun, Seungwoo Lee, Jinchul Choi, Yongsang Yun
  • Patent number: 11300644
    Abstract: The technology disclosed in this invention belongs to both the field of Nuclear Quadrupole Resonance (NQR) and nuclear geomagnetic resonance application. Technically, a nuclear quadrupole resonance detection system and its antenna are provided. The antenna includes two coils to make a gradient antenna wherein they simultaneously receive both the signal from the target region and the external radio frequency interference. Structurally, the first coil is positioned as a regular circular coil, while the second coil is annular and evenly distributed around the first coil peripherally. These coils are on the same plane with equal areas but have opposite winding directions. The systems specific to the disclosed antenna are also included. The configuration of the invented antenna can effectively increase the capability of suppressing environmental electromagnetic radio frequency interference, thereby enhancing the detection of the NQR or geomagnetic resonance signals.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: April 12, 2022
    Inventor: Tongsheng Zhang
  • Patent number: 11294831
    Abstract: A method is performed to compile input data including a plurality of pulse sequences, hardware parameters obtained from a computing device, and a mathematical model with time-dependent control parameters to decrease a computation time of the input data. The method also includes providing the input data to the computing device to allow the computing device to run a computation of the input data. The method further includes converting the pulse sequences into memory-aligned arrays to decrease the computation time of the input data. The method includes calculating optimized output data using an adaptive step size computation to decrease the computation time needed to compute the output data.
    Type: Grant
    Filed: December 21, 2020
    Date of Patent: April 5, 2022
    Inventors: Paul Nation, Naoki Kanazawa
  • Patent number: 11269029
    Abstract: In a magnetic resonance examination system, the patient carrier is mounted moveably in a direction transverse to the support surface and an RF antenna has a fixed geometrical relation to the support surface.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: March 8, 2022
    Assignee: Koninklijke Philips N.V.
    Inventors: Paul Royston Harvey, Cornelis Leonardus Gerardus Ham
  • Patent number: 11243285
    Abstract: A method is for performing an angiographic measurement of a main measurement region of a patient via a magnetic resonance system.
    Type: Grant
    Filed: May 30, 2018
    Date of Patent: February 8, 2022
    Inventor: Miriam Keil
  • Patent number: 11237237
    Abstract: Embodiments of a compact portable nuclear magnetic resonance (NMR) device are described which generally include a housing that provides a magnetic shield; an axisymmetric permanent magnet assembly in the housing and having a bore, a plurality of magnetic elements that together provide a well confined axisymmetric magnetization for generating a near-homogenous magnetic dipole field B0 directed along a longitudinal axis and providing a sample cavity for receiving a sample, and high magnetic permeability soft steel poles to improve field uniformity: a shimming assembly with coils disposed at the longitudinal axis for spatially correcting the near homogenous magnetic field B0; and a spectrometer having a control unit for measuring a metabolite in the sample by applying magnetic stimulus pulses to the sample, measuring free induction delay signals generated by an ensemble of hydrogen protons within the sample; and suppressing a water signal by using a dephasing gradient with frequency selective suppression.
    Type: Grant
    Filed: March 13, 2021
    Date of Patent: February 1, 2022
    Assignee: 10250929 Canada Inc.
    Inventor: David O'Brien
  • Patent number: 11204399
    Abstract: Described here are systems and methods for using a laser-induced demagnetization of magnetic particles disbursed in a tracking marker to generate variable susceptibility effects that can be imaged with magnetic resonance imaging (“MRI”). As one example, laser power is delivered to nickel particles using fiber optics. This demagnetization effect can be used in rapid tracking of interventional devices by subtracting the two images acquired when the laser is off and on.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: December 21, 2021
    Inventor: Charles Cunningham
  • Patent number: 11187765
    Abstract: The present disclosure relates to apparatuses and methods for stimulating a magneto-optical defect material with defect centers in a magnetic detection system using a stimulation process to significantly increase magnetic sensitivity of the detection system. The system utilizes a Ramsey pulse sequence pair or a shifted magnetometry adapted cancellation (SMAC) pair to detect and measure the magnetic field acting on the system. Utilizing a pair of magnetic measurements that are approximately in quadrature improves the dynamic range and accuracy of the magnetic detection.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: November 30, 2021
    Inventors: Arul Manickam, Stephen M. Alessandrini, Gregory Scott Bruce, Peter G. Kaup
  • Patent number: 11093794
    Abstract: A pattern recognition device comprising: a coupled network of damped, nonlinear, dynamic elements configured to generate an output response in response to at least one environmental condition, wherein each element has an associated multi-stable potential energy function that defines multiple energy states of an individual element, and wherein the elements are tuned such that environmental noise triggers stochastic resonance between energy levels of at least two elements; a processor configured to monitor the output response over time and to determine a probability that the pattern recognition device is in a given state based on the monitored output response; and detecting a pattern in the at least one environmental condition based on the probability.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: August 17, 2021
    Assignee: United States of America as represented by the Secretary of the Navy
    Inventors: Paul R. De La Houssaye, Benjamin J. Migliori, Adi Ratan Bulsara, Chriswell Hutchens, Justin M. Mauger
  • Patent number: 11061093
    Abstract: A dynamic phantom for use with a functional magnetic resonance imaging (fMRI) device is described. In one example, the dynamic phantom includes an outer housing, an inner cylinder including a removable divider, and a gearbox that can rotate the cylinder, all of which are made from fMRI-compatible materials. The divider forms longitudinal compartments inside the cylinder that can each contain a contrast material. When the cylinder contains contrast materials having at least two different concentrations, and a space between the cylinder and the housing also contains a contrast material, rotation of the cylinder produces biomimetic hemodynamic signals that may be detected by the fMRI device.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: July 13, 2021
    Inventors: Lilianne Mujica-Parodi, Helmut Strey, Daniel Dedora
  • Patent number: 10996365
    Abstract: A logging instrument for estimating a property of a formation is provided. The instrument includes a magnet to generate a magnetic field. The instrument also includes pulse sequencer circuitry that supplies radio frequency (RF) signals. The instrument additionally includes an antenna system configured to transmit the RF signals and to obtain nuclear magnetic resonance (NMR) measurements of the formation in response to the transmitted RF signals. In one aspect, the logging tool contains a temperature sensor configured to obtain temperature measurements of the magnet. The instrument additionally includes a control unit communicatively coupled to the temperature sensor, the antenna system and the pulse sequencer circuitry and configured to receive the temperature measurements and selectively adjust operating parameters of the pulse sequencer circuitry based on the received temperature measurements in order to maintain optimal intensity of the magnetic field.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: May 4, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Lilong Li, Arcady Reidermann, David R. Beard, Songhua Chen
  • Patent number: 10982534
    Abstract: The disclosed embodiments include a method to determine formation properties of a downhole formation and a downhole logging system. In one embodiment, the method includes obtaining a first set of measurements of a formation from a multi-component induction logging tool and performing an inversion process of the first set of measurements to determine a first set of values for one or more formation properties of the formation. The method also includes determining a second set of values for the model parameters based on the measurements of a second logging tool. The method further includes comparing values of the first set of values with corresponding values of the second set of values to determine a data quality of the values of the first set of values and accepting the values of the first set of values if the data quality of the values is above a first threshold.
    Type: Grant
    Filed: December 7, 2016
    Date of Patent: April 20, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Junsheng Hou
  • Patent number: 10973435
    Abstract: An ultra-low field pre-pulse Magnetic Resonance Imaging (PMRI) system for a head includes RF coils defining a bore for head access, a pre-pulse coil outside the RF coils, and a coil assembly including a main magnetic field coil and gradient coils outside the pre-pulse coil. The PMRI system includes a first cylindrical shield concentric with the RF coils and made from conductive materials. The first cylindrical shield partially encloses the RF coils and inside the pre-pulse coil for shielding the RF coils from environmental electromagnetic disturbances.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: April 13, 2021
    Inventors: Steven J. Schiff, Johnes Obungoloch, Joshua Harper, Srinivas Tadigadapa, Igor Savukov
  • Patent number: 10976238
    Abstract: A measurement apparatus for micro- and nano-scale materials and a measurement method thereof are provided. The measurement apparatus for the micro- and nano-scale material includes a transmission electron microscope to generate a magnetic field, and a conductive flat punch and a sample which are arranged in the magnetic field. The sample includes the micro- and nano-scale materials. When the current passes through the sample and the conductive flat punch, the conductive flat punch deflects laterally relative to the sample with controllable displacement driven by the electromagnetic force. The required lateral displacement of the present invention is controllable, so that the utilization rate of equipment is greatly increased, and the cost is reduced. In addition, the whole test is performed in the transmission electron microscope, so that a measurement process can be observed in real time.
    Type: Grant
    Filed: January 30, 2019
    Date of Patent: April 13, 2021
    Assignee: Xi'an Jiaotong University
    Inventors: Zhiwei Shan, Huanhuan Lu, Ju Li
  • Patent number: 10969453
    Abstract: Systems and methods for magnetic field-dependent relaxometry using magnetic resonance imaging (“MRI”] are provided. Relaxation parameters, including longitudinal relaxation time (“T1”) and transverse relaxation time (“T2”), are estimated from magnetic resonance signal data acquired at multiple different magnetic field strengths using the same MRI system. By measuring these relaxation parameters as a function of magnetic field strength, T1 dispersion data, T2 dispersion data, or both, are generated. Based on this dispersion data, quantitative physiological parameters can be estimated. As one example, iron content can be estimated from T2 dispersion data.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: April 6, 2021
    Inventors: Chad Tyler Harris, David Mark Deschenes, Alexander Gyles Panther, Jeff Alan Stainsby, Philip J. Beatty
  • Patent number: 10921271
    Abstract: System for detecting explosive substances and drugs by nuclear quadrupole resonance having a central processing unit (UC) which connects to a storage, data processing, and interface unit (USPI) provided with a user console (1C) and a with a head (CS1) for scanning explosives/drugs around the legs and a head (CS2) for scanning suspicious objects on the ground or that cannot be moved having a radio processing system (SPR) which includes a programmable RF signal generator (DDS) which transmits RF pulses to a power amplifier (AP) coupled to an interface for gain control and for the acquisition of the reflected signal level (IAP), a series-parallel tuning circuit (CA) consisting of a flat spiral ferrite-core coil (L) and two variable capacitors (CV1, CV2) driven by two stepper motors (M1, M2) which are controlled by an automatic tuning matching module (WIAA) through control interfaces.
    Type: Grant
    Filed: May 16, 2017
    Date of Patent: February 16, 2021
    Inventors: Sandel Aurelian Zaharia, Marian Apostol, Silviu Ionita, Vasile Gabriel Iana, Cristian Monea, Laurentiu-Mihai Ionescu, Daniel Constantin Anghel, Madalin Eugen Ilie, Alexandru Florian Varga
  • Patent number: 10901062
    Abstract: A synchronized readout (SR) technique for spectrally selective detection of oscillating magnetic fields with sub-millihertz resolution, using coherent manipulation of solid state spins.
    Type: Grant
    Filed: May 24, 2017
    Date of Patent: January 26, 2021
    Assignee: President and Fellows of Harvard College
    Inventors: Ronald L. Walsworth, David Glenn, Dominik Bucher
  • Patent number: 10901052
    Abstract: An atomic magnetometer system includes a laser system, a cell, and an optics setup. The laser system is configured to generate a pump beam and a probe beam. The cell encloses an atomic vapor. The optics setup is configured to route the pump beam and the probe beam. The pump beam propagates along a path through the atomic vapor and the probe beam also propagates substantially along the path through the atomic vapor. The pump beam and the probe beam traverse the atomic vapor along two or more non-parallel directions. The interaction of the pump beam with the atomic vapor is modulated at or near harmonics of a magnetic resonance frequency.
    Type: Grant
    Filed: December 10, 2018
    Date of Patent: January 26, 2021
    Assignee: AOSense, Inc.
    Inventors: Brian R. Patton, Micah Ledbetter, Ethan Pratt
  • Patent number: 10885678
    Abstract: Techniques for facilitating quantum tomography are provided. In one example, a system includes a circuit generation component and a tomography analysis component. The circuit generation component generates tomography experiment data indicative of information for a set of tomography experiments based on quantum circuit data indicative of a machine-readable description of a quantum circuit. The tomography analysis component generates tomogram data based on experimental result data indicative of information associated with the tomography experiment data.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: January 5, 2021
    Inventors: Lev Samuel Bishop, Andrew W. Cross, Jay M. Gambetta
  • Patent number: 10884155
    Abstract: A method and an apparatus for measuring oil content of a tight reservoir based on nuclear magnetic resonance includes applying a pulse sequence to a tight reservoir rock, and after applying a first pulse and a last pulse in the pulse sequence, applying a gradient magnetic field to the tight reservoir rock, respectively, directions of the two applied gradient magnetic fields being opposite to each other, wherein the pulse sequence is composed of three 90° pulses; acquiring a nuclear magnetic resonance signal of the tight reservoir rock; and determining oil content of the tight reservoir rock according to an intensity of the nuclear magnetic resonance signal. The method can accurately distinguish an oil phase nuclear magnetic resonance signal and a water phase nuclear magnetic resonance signal in nanopores of tight reservoir rock, thereby effectively improving the accuracy of the detection result of the oil content of the tight reservoir rock.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: January 5, 2021
    Assignee: PetroChina Company Limited
    Inventors: Hua Tian, Shuichang Zhang, Shaobo Liu, Caineng Zou, Keyu Liu, Xuesong Lu, Mengjun Zhao, Lin Jiang, Xingzhi Ma, Bin Zhang, Junjia Fan, Peiqiang Yang
  • Patent number: 10874326
    Abstract: A system and method for magnetic resonance imaging is provided. The method includes generating a main magnetic field through a region of interest (ROI), applying a slice selection gradient to an slice of the ROI, applying a plurality of RF pulses to the slice to generate a plurality of echoes, applying a first encoding gradient and a second encoding gradient on the echoes, and generating MR images based on the echoes.
    Type: Grant
    Filed: August 5, 2019
    Date of Patent: December 29, 2020
    Inventors: Guobin Li, Chaohong Wang, Zhaopeng Li
  • Patent number: 10859656
    Abstract: A method of determining an exchange rate between a solute material and a solvent material in chemical exchange with each other in a sample comprises performing a plurality of CEST scans on the sample to determine a reference data signal and a label data signal; simulating a plurality of CEST scans on the sample to obtain a reference dictionary signal and a plurality of label dictionary signals, each label dictionary signal corresponding to a candidate exchange rate; correcting the reference dictionary signal and each label dictionary signal for a magnetization transfer effect; determining a final data signal based on the reference data signal and the label data signal; determining a plurality of final dictionary signals based on the reference dictionary signal and the plurality of label dictionary signals; and determining the exchange rate by matching the final data signal to one of the plurality of final dictionary signals.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: December 8, 2020
    Assignee: Cedars-Sinai Medical Center
    Inventors: Debiao Li, Zhengwei Zhou
  • Patent number: 10859521
    Abstract: The present disclosure provides a method of measuring a percent solids content (PSC) of solids by mass in a slurry catalyst composition, where the solids include a catalyst. The method includes obtaining a first time domain (TD) 1H-nuclear magnetic resonance (NMR) spectrum using a time domain (TD)-NMR spectrometer and a test sample of the slurry catalyst composition from which a value of a voltage signal (a) that represents the slurry catalyst composition is determined. A second TD 1H-NMR spectrum using the TD NMR spectrometer is obtained for a neat sample of the suspension liquid for the solids of the slurry catalyst composition, where a value of a voltage signal (b) from the second TD 1H-NMR spectrum that represents the suspension liquid for the solids of the slurry catalyst composition is determined.
    Type: Grant
    Filed: November 15, 2017
    Date of Patent: December 8, 2020
    Assignee: Univation Technologies, LLC
    Inventors: Kishori Deshpande, Gian C. Gobbi, Nathan Rau
  • Patent number: 10858935
    Abstract: Implementations of the present disclosure relate to apparatuses, systems, and methods for determining when a well cleanup process has established developed flow and then extrapolating out modeled fluid parameter values to determine parameter values for a formation fluid. The model fluid parameter values may be modeled using a power law function having a specified exponent value.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: December 8, 2020
    Inventors: Adriaan Gisolf, Youxiang Zuo, Ryan Sangjun Lee, Jonathan Leonard
  • Patent number: 10846862
    Abstract: An image processing method includes: assigning a predetermined new label to the pixels determined to be assigned the label; and setting a position of the pixel assigned the label as a target position and assigning the label with the same value to peripheral pixels located around the pixel at the target position. A label update step repeats a peripheral pixel determination step, a label assignment step of assigning the label to the peripheral pixels, a target position movement step of moving a new target position that is a position of any one of the peripheral pixels assigned the label, and a return position storage step of, when there are a plurality of peripheral pixels assigned the label, storing positions of the peripheral pixels, other than the peripheral pixel at the new target position moved in the target position movement step, until there is no return position.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: November 24, 2020
    Inventor: Mitsutomo Kariya
  • Patent number: 10830849
    Abstract: Systems and methods for rapidly ramping the magnetic field of a superconducting magnet, such as a superconducting magnet adapted for use in a magnetic resonance imaging system, are provided. The magnetic field can be rapidly ramped up or down by changing the current density in the superconducting magnet while monitoring and controlling the superconducting magnet's temperature to remain below a transition temperature. A superconducting switch is used to connect the superconducting magnet and a power supply in a connected circuit. The current generated by the power supply is then adjusted to increase or decrease the current density in the superconducting magnet to respectively ramp up or ramp down the magnetic field strength in a controlled manner. The ramp rate at which the magnetic field strength is changed is determined and optimized based on the operating parameters of the superconducting magnet and the current being generated by the power supply.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: November 10, 2020
    Inventors: Jeff A. Stainsby, Chad T. Harris, Alexander G. Panther, Cameron A. Piron
  • Patent number: 10821542
    Abstract: A radio frequency (RF) power delivery system includes a first RF generator and a second RF generator. The first RF generator operates as a master RF generator, and the second RF generator operates as a slave RF generator. The slave RF generator includes a detector for sensing an electrical characteristic of the RF signal of the slave RF generator. The slave RF generator also includes a detector for sensing an electrical characteristic of the RF signal from the master RF generator. Operation of the slave RF generator is controlled by a host or controller. The host or controller operates the slave RF generator in accordance with electrical properties determined by the second detector.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 3, 2020
    Assignee: MKS Instruments, Inc.
    Inventors: Nicholas Nelson, David J. Coumou
  • Patent number: 10823811
    Abstract: In a method and magnetic resonance for calibrating a control sequence for the apparatus, having a first radio-frequency pulse and a second radio-frequency pulse, for a magnetic resonance examination of an examination region of an object, a first reference value for the first radio-frequency pulse for resonant excitation of a first substance is determined, and a second reference value for the second radio-frequency pulse for resonant excitation of a second substance is determined. The determination of the first reference value includes a selective excitation of the first substance and/or the determination of the second reference value includes a selective excitation of the second substance. The MR control sequence is calibrated by assignment, in a processor, of the first reference value to the first radio-frequency pulse and assignment of the second reference value to the second radio-frequency pulse.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: November 3, 2020
    Assignee: Siemens Healthcare GmbH
    Inventor: Uvo Hoelscher
  • Patent number: 10802099
    Abstract: A methods are provided for investigating a sample containing hydrocarbons by subjecting the sample to a nuclear magnetic resonance (NMR) sequence using NMR equipment, using the NMR equipment to detect signals from the sample in response to the NMR sequence, analyzing the signals to extract a distribution of relaxation times (or diffusions), and computing a value for a parameter of the sample as a function of at least one of the relaxation times (or diffusions), wherein the computing utilizes a correction factor that modifies the value for the parameter as a function of relaxation time for at least short relaxation times (or as a function of diffusion for at least large diffusion coefficients).
    Type: Grant
    Filed: April 3, 2018
    Date of Patent: October 13, 2020
    Inventors: Lalitha Venkataramanan, Fred K. Gruber, Tarek M. Habashy, Ridvan Akkurt, Badarinadh Vissapragada, Richard E. Lewis, Erik Rylander
  • Patent number: 10788550
    Abstract: According to some aspects, a method of producing a permanent magnet shim configured to improve a profile of a B0 magnetic field produced by a B0 magnet is provided. The method comprises determining deviation of the B0 magnetic field from a desired B0 magnetic field, determining a magnetic pattern that, when applied to magnetic material, produces a corrective magnetic field that corrects for at least some of the determined deviation, and applying the magnetic pattern to the magnetic material to produce the permanent magnet shim. According to some aspects, a permanent magnet shim for improving a profile of a B0 magnetic field produced by a B0 magnet is provided. The permanent magnet shim comprises magnetic material having a predetermined magnetic pattern applied thereto that produces a corrective magnetic field to improve the profile of the B0 magnetic field.
    Type: Grant
    Filed: August 30, 2018
    Date of Patent: September 29, 2020
    Assignee: Hyperfine Research, Inc.
    Inventors: Cedric Hugon, Michael Stephen Poole, Tyler S. Ralston
  • Patent number: 10788560
    Abstract: A method for verifying at least one default value for a magnetic resonance examination, a verifying unit, a magnetic resonance device and a computer program product are provided. According to the method, at least one default value for an electromagnetic property and a sequence segment are sent to a verifying unit. The verifying unit uses the sequence segment to determine at least one electromagnetic property. The at least one default value is verified by the verifying unit with respect to the at least one electromagnetic property.
    Type: Grant
    Filed: February 11, 2017
    Date of Patent: September 29, 2020
    Assignee: Siemens Healthcare GmbH
    Inventors: Carsten Prinz, Volker Schnetter
  • Patent number: 10779762
    Abstract: Disclosed are systems, biomarkers, and methods for the diagnosis of Alzheimer's Disease.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: September 22, 2020
    Assignee: Washington University
    Inventors: Dmitriy Yablonskiy, Yue Zhao
  • Patent number: 10742999
    Abstract: The techniques described herein relate to methods, apparatus, and computer readable media configured to encode or decode a region of interest associated with video data. A spherical region structure is associated with the video data that specifies the region of interest on a sphere, the spherical region structure including a reference point of the region of interest on the sphere, and data indicative of a set of side points, comprising a side point for each side of the region of interest on the sphere. The region of interest in the video data is determined based on the reference point and the set of side points. The video data can be composite video data. The spherical region structure, and/or metadata based on the spherical region structure, can be implicitly or explicitly associated with the video data.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: August 11, 2020
    Assignee: MediaTek Inc.
    Inventors: Xin Wang, Wang Lin Lai, Lulin Chen, Shan Liu
  • Patent number: 10702339
    Abstract: Embodiments include a system for determining cardiovascular information for a patient. The system may include at least one computer system configured to receive patient-specific data regarding a geometry of the patient's heart, and create a three-dimensional model representing at least a portion of the patient's heart based on the patient-specific data. The at least one computer system may be further configured to create a physics-based model relating to a blood flow characteristic of the patient's heart and determine a fractional flow reserve within the patient's heart based on the three-dimensional model and the physics-based model.
    Type: Grant
    Filed: May 13, 2014
    Date of Patent: July 7, 2020
    Assignee: HeartFlow, Inc.
    Inventor: Charles A. Taylor
  • Patent number: 10690800
    Abstract: Certain aspects of the present disclosure provide methods and apparatus for sensing a fluid flowing in a conduit using a mobile electron paramagnetic resonance (EPR) device. The mobile EPR device may include one or more EPR sensors for making EPR measurements and, for certain aspects, may include one or more other sensors for making other measurements. One example mobile EPR device for deploying in a conduit generally includes a housing configured to be conveyed by a fluid flowing in the conduit; a bore in the housing for receiving the fluid; and an EPR sensor disposed adjacent to the bore for EPR sensing of the fluid as the mobile EPR device traverses a section of the conduit.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: June 23, 2020
    Assignee: MICROSILICON, INC.
    Inventors: Omar Kulbrandstad, Manuel Godoy
  • Patent number: 10658572
    Abstract: A magnetoresistance effect element includes first and second magnetic layers having a perpendicular magnetization direction, and a first non-magnetic layer disposed adjacent to the first magnetic layer and on a side opposite to a side on which the second magnetic layer is disposed. An interfacial perpendicular magnetic anisotropy exists at an interface between the first magnetic layer and the first non-magnetic layer, and the anisotropy causes the first magnetic layer to have a magnetization direction perpendicular to the surface of the layers. An atomic fraction of all magnetic elements to all magnetic and non-magnetic elements included in the second magnetic layer is smaller than that of the first magnetic layer.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: May 19, 2020
    Inventors: Hideo Sato, Shoji Ikeda, Mathias Bersweiler, Hiroaki Honjo, Kyota Watanabe, Shunsuke Fukami, Fumihiro Matsukura, Kenchi Ito, Masaaki Niwa, Tetsuo Endoh, Hideo Ohno
  • Patent number: 10651688
    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for dynamically tuning circuit elements. One aspect includes a variable capacitance device. The device includes a first capacitor, a first switch, a second capacitor, a second switch, and control circuitry. The control circuitry is configured to adjust respective capacitances of the first and second capacitors by causing a first control signal to be applied to the first-switch control terminal for a duration of time in response to detecting a zero voltage condition across the first switch, and by causing a second control signal to be applied to the second-switch control terminal for the duration of time in response to detecting a zero voltage condition across the second switch.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: May 12, 2020
    Assignee: WiTricity Corporation
    Inventors: Curt Karnstedt, Christopher Buenrostro
  • Patent number: 10634630
    Abstract: A method for determining the solids content, fines content and/or particle size distribution of the solids in an oil sands process stream test sample comprising bitumen, solids and water using low-field time-domain NMR is provided which involves building a non-solids partial least squares calibration model using oil sands process streams calibration samples having a known bitumen content, solids content, water content, fines content and/or particle size distribution by subjecting the calibration samples to a first T1-weighted T2 measurement NMR pulse sequence that maximizes very fast relaxing signals and a second T1-weighted T2 measurement NMR pulse sequence that maximizes slow relaxing signals. The measurement of other sample properties strongly correlated with surface area, such as methylene blue index, can also be measured using a partial least squares calibration model.
    Type: Grant
    Filed: April 3, 2017
    Date of Patent: April 28, 2020
    Inventor: Richard Paproski
  • Patent number: 10627468
    Abstract: Apparatus, methods, and other embodiments associated with NMR fingerprinting are described. One example NMR apparatus includes an NMR logic configured to repetitively and variably sample a (k, t, E) space associated with an object to acquire a set of NMR signals. Members of the set of NMR signals are associated with different points in the (k, t, E) space. Sampling is performed with t and/or E varying in a non-constant way. The varying parameters may include flip angle, echo time, RF amplitude, and other parameters. The NMR apparatus may also include a signal logic configured to produce an NMR signal evolution from the NMR signals, and a characterization logic configured to characterize a resonant species in the object as a result of comparing acquired signals to reference signals.
    Type: Grant
    Filed: September 19, 2012
    Date of Patent: April 21, 2020
    Assignee: Case Western Reserve University
    Inventors: Mark Griswold, Nicole Seiberlich, Vikas Gulani, Dan Ma
  • Patent number: 10613182
    Abstract: A method to quantify and map iron deposits in the brain with diffusion-weighted magnetic resonance imaging (MRI) is based on the differential sensitivity of mono-polar (MPG) gradient pulse diffusion sequences and bipolar (BPG) sequences on the local magnetic field gradients induced by iron deposits and their cross-term with the diffusion-encoding gradients.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: April 7, 2020
    Inventor: Denis Le Bihan
  • Patent number: 10602957
    Abstract: Systems and methods for imaging and detecting the biofield of a living subject are provided. A biofield detection system can include a number of features, including a nuclear magnetic resonance imaging system, a fluid container configured to hold a fluid and the living subject, and a fluid management system configured to enhance a coherence of the fluid volume. The biofield detection system can implement a biofield detection scheme that compares a baseline NMR image of the fluid in the absence of the subject to a NMR image of the fluid surrounding the subject. The two images can be compared and analyzed to detect variances relating to field effects of the subject. Systems and methods are also provided in which environmental factors can be introduced to the fluid volume or the living subject. Subsequent detection scans can detect changes in the biofield based on the introduction of environmental factors.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: March 31, 2020
    Inventor: Stanton Thomas
  • Patent number: 10578709
    Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for detecting electronic counter measure (ECM) signals and embedding covert messages in radar or sonar signals. In one aspect, a method for detecting ECM signals includes receiving a radar return signal from an object. The method includes determining whether radar return signal includes a TM signal, and identifying the radar return signal as a skin return signal or an electronic counter measure signal based on whether the radar return signal includes the TM signal.
    Type: Grant
    Filed: April 20, 2017
    Date of Patent: March 3, 2020
    Assignee: TM IP Holdings, LLC
    Inventors: Daniel L. Hodges, Richard C. Gerdes
  • Patent number: 10578692
    Abstract: According to one embodiment, a gradient coil unit for a magnetic resonance imaging apparatus includes gradient coils for forming gradient magnetic fields in mutually orthogonal three axis directions. At least one of the gradient coils includes a conductor part along a coil pattern and a holding part holding the coil pattern. A passage of a coolant is formed inside at least one of the conductor part and the holding part. The passage has a non-constant cross section.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: March 3, 2020
    Inventors: Kazuhiko Tsujita, Yoshitomo Sakakura
  • Patent number: 10578696
    Abstract: Method, system and non-transitory computer-accessible medium can be provided for performing magnetic resonance spectroscopy for at least one structure. For example, with such method and/or computer-accessible medium, it is possible to receive information related to a substantially simultaneous acquisition of a stimulated echo pathway and a double spin echo associated with at least one portion of the at least one structure.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: March 3, 2020
    Assignee: New York University
    Inventors: Oded Gonen, Assaf Tal
  • Patent number: 10575988
    Abstract: An RF (radio frequency) positioning system and related method for automated or assisted eye-docking in ophthalmic surgery. The system includes an RF detector system on a laser head and an RFID tag on a patient interface to be mounted on the patient's eye. The detector system includes four RF antennas located on a horizontal plane for detecting RF signals from the RFID tag, where one pair of antennas are located along the X direction at equal distances from the optical axis of the laser head and another pair are located along the Y direction at equal distances from the optical axis. Based on relative strengths and phase difference of the RF signals detected by each pair of antennas, the RF detector system determines whether the patient interface is centered on the optical axis. The RF detector system controls the laser head to move toward the patient interface until the latter is centered on the optical axis.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: March 3, 2020
    Inventors: Harvey I. Liu, John P. Beale, Jose L. Garcia